A.J. Derby

In the four practices open to reporters this spring, rookie tight end Mike Gesicki of Penn State has been a non-factor. He has even looked lost at times.

As a result, his reps have largely come with the backups this spring, behind returning veterans A.J. Derby and MarQueis Gray.

Now, if the calendar read early September instead of early June, this would be a flashing red light. Instead, it's one of the countless unresolved storylines as the Dolphins near their summer break.

Rookie tight ends rarely make much of a fantasy impact, though Evan Engram posted top-five numbers last season thanks to a series of injuries to the Giants’ receiving corps. Mike Gesicki is a great athlete and can really fly down the seam with his 4.54 speed. He’ll also provide Adam Gase with a big target in the red zone. Jarvis Landry vacated 161 targets from last year, and the Dolphins have only signed Albert Wilson and Danny Amendola to replace him, so there are plenty of targets up for grabs. However, it's clear Gesicki still has a lot of learning to do in this offense at this early juncture.